runner takes graphPath as argument

Signed-off-by: Peter Parente <pparent@us.ibm.com>
better error logging in container pool
* Logger session creation moved to constructors from main

Signed-off-by: Simon Leung <leungs@us.ibm.com>
godeps

Signed-off-by: Simon Leung <leungs@us.ibm.com>